Update Unzip Repository Plugin to work with Nexus OSS 2.8.x.
Change all Google-Guice to Java inject annotations.
Load unzip-repo.js as a Nexus WebResource and implements the default
UiContributor to load this js and the unzip-repository-plugin-boot.js
instead of loading the defaults resources.

Signed-off-by: Angel Lopez-Cima <angellopezcima@hotmail.com>
Change the order of the interfaces in the DefaultUnzipRepository to
register this repository under the ShadowRepository.class.getName()
entry.

Signed-off-by: Angel López Cima <angellopezcima@hotmail.com>
Recover the annotation to set the path prefix "unzip".

Signed-off-by: Angel Lopez-Cima <angellopezcima@hotmail.com>